Disk harrow



Jan. 3, 1939. 1-1.3. RAPP El AL 20, 67

DISK marrow Original Filed Sept. 4, 1954 v 3 Sheets-Sheet 2 L A n P P A R H Jan. 3, 1939.

. Originalfiled Sept. 4, 1934 a Sheets-Sheet 5 a iaeedsaa .13, 1939 mirth-Ares PATENT OFFICE DISK KARROW Howard B. Rapp and Ralph E. Ablott, Santa Ana, Calif., assignors to Howard B. Ram), Santa Ana,

Calif., and Truman G. Rapp, Los Angeles,

Calif.; Sally Rapp executrlx of said Truman 0.

Ram, dece d Original No. 2,007,062, dated July 2, 1935, Serial No. 'i42,590, September-i, 1934. Application for reissue June 28, 1937 Serial No. 150,864 v 8Claims.

This invention relates to disk harrows, andmore particularly to a disk barrow of the single tandem offset type.

It is an object, of this invention to provide a means through which the gangs of a single tandem disk harrow may be operatively associated together and with a'draft means'and so as to permit of the operation of the gangs of disks to and from angled position as desired, and so as to permit of the automatic release of the means providing for the holding of gangs in angled position upon the turning of the draft means to permit the gangs to move out of angle when negotiating a turn in a direction around the normally open end of the gangs of disks.

Another object of this inventionis to provide a means for operatively connecting a pair of gangs of disks of a single tandem disk harrow together.

so that the gangs of disks may at all times be maintained locked in desired angular relation, and a means for automatically releasing the said connecting means to permit the gangs to negotiate a turn upon the turning of the tractor in the direction around the normally open ends of the gangs of disks.

Other objects and advantages of this invention it is believed will be apparent from the following detailed description of a preferred embodiment thereof as illustrated in the accompanying drawings. i

- In the drawings:

Figure 1 is a top plan view of the disk harrow embodying our invention illustrating the gangs ofdisks in parallel or non-operating position.

. Figure 2 is a similar top plan view of the disk harrow embodying our invention illustrating the gangs of disks as angled apart to angled or working position and as locked or held permanently in such angled position under conditions of operation.

Figure 3 is a similar top plan view 01 the disk narrow embodying our invention illustrating the gangs of disks as moved together in the making In the preferred embodiment of our invention as illustrated in the accompanying drawings l indicates a front gang of disks and I a rear gang of disks. The gangs of disks may be of any suitable or desirable construction well known in the art, and such gangs generally include a gang rod 3 upon which concavo-convex disks 4 are mounted, the gang rods being supported in frames 5. The gangs'of disks I and 2 are connected together by some form of hinge or pivot connection 6 which permits the gangs of disks to swing apart atone end to the working or angled position as is illustrated in Figure 2, or tobe moved to the parallel relationship or wheeling position of Figure 1. I

In order to operatively connect the disk' harrow with a tractor I or other similar draft means, a hitch 8 is provided which hitch 8 may be of several different forms of construction and is herein illustrated as including a triangular arrangement of hitch bars 9, I and II which are pivotally connected at a pivot l2 to the one corner of the frame of the front gang l and is connected by an angle bar 13 to'the opposite corner ofthe frame 5 of the rear gang 2, so that as the forward draft is imposed upon the hitch 8 by the forward movement of the tractor or other draft member 1, the hitch 8 will pivot around the pivot l2, pulling this corner of the front gang of disks forward and at the same time pulling the opposite corner of the rear gangs of disks forward to cause the implement to change from the wheeling position of Figure 1 to the angled position of Figure 2.-

in their respective angled or parallel positions, and likewise to permit of the closing of the gangs I and 2 together while in motion at the ends of .the gangs 'I and 2 which are normally spread v apart when in operation upon the turning of the tractor 1 and to permit of this operation being performed automatically without manipulation of the control means by the operator, the following means are preferably provided:

A holding bar II is connected between the gangs I and 2 so as to permit adjustment of the angularity of the gangs when in working position and to hold the gangs in the adjusted angled position and the holding bar I 4 has on its forward end a plurality of lock detents l5 into any one of which the plunger It may be urged to secure the forward end of the bar H to the frame 5 of the front -gang I. The bar '4 passes through a slide "connected to the frame 5 of the rear gang 2 and is provided with a lock detent l8 into which the lock plunger I9 is yieldably urged to normally secure the rear end of the bar ll to the frame 5 of the rear gang in position to permit pivotal movement of the rear end of the bar I 4.

In order to retain the bar I4 in position and the bolt l6 projects in passing into any one of the lock detents l5. Secured to the forward and rearward end of the'bar II are stop pins 22 which act to limit the possible movement of the bar I through either the yoke or slide 2! or the slide ll. v

The lock plungers l6 and I! are substantially similar and are operated through the same means and include the plungers It or iii which are yieldably urged into locking position by means of com: pression springs 23 which operate between shoulders 24 and the end plates 25 of the plunger housings and the ends of the plungers are pivotally secured to pivotally mounted bell crank levers 25 and 21, respectively. The bell crank lever 26 is pivotally mounted on the frame 5 of the front gang i and is connected through a rope or flexible operating member 28 which passes through a guide 29 mounted on the frame 5-o f the front gang and extends forward to a position where it may be actuated manually by the operator of the tractor. The bell crank lever 21 is pivotally mounted on the frame 5 of the'rear gang! and is connected through a chain or other suitable flexible operating member 30 with a turning arm 3| which is secured to the frame of the tractor I in position oiIset from the point of attachment of the draw bar 32 of the tractor with the hitch 8 of the disk.

In order to maintain the chain 30 in correct operating position, the same passes over a guide pulley 33 mounted upon the frame 5 of the forward gang i.

The preferred embodiment of our invention as illustrated in the drawings has preferably the following mode of operation:

When the disk harrow is in position as illustrated in Figure 1 and it is desired to angle the gangs of the barrow to move the same from the position illustrated in Figure 1 to the angled position illustrated in Figure 2, and the tractor I is in operation moving forwardly,- the operator merely exerts a forward pull upon the rope 28 to pull the latch plunger Hi from within the latch detents l5 permitting the two gangs to spread upon the connecting pivot or hitch G to the desired angular relation and the, operator may stop the disk gangs in the desired angular relation by releasing the rope I! to permit the plunger I6 to fall into the desired detent l5, or by retaining a hold upon the rope 28 may permit the gangs to angle to their limit, which is determined by the forward end stop 22 of the holding bar ll.

The gangs of disks are held positively in angular relation when the.plunger I. has fallen into the desired detent I! so that it is not possible for the gangs to run together under such conditions as when the disk harrow is operating down hill or under other varying soil conditions.

Whenitisdesiredtomakearight turnor turn around the'openendsof thegangof disks. the operator of the tractor l merely operates the tractorinamannertomakearightturn. This operation results in the forward pull being exerteduponthechainiltoreleaaethelatchpin end of the rear gang of disks forwardly to close angular relation and the latch I! will again fall gether from angular relation, and means oper and from angled relation, a hitch for connecting able means and operable upon the turning of the I9 from the detent ll, permitting the holding bar II to slide rearwardly through the slide H as the gangs I and I move together from the position indicated in Figure 1 to the position indicated in Figure 3. The force exerted by the turning of the tractor having operated to release the latch at the rear end of the holding bar ll holds the gangs l and 2 in their desired spaced relation and continued forward pull upon the chain 30 by the turning of the tractor may where necessary have resulted in pulling a right-hand the gangs so that they may properly negotiate a right-hand turn. Upon straightening out the tractor again, the gangs l and 2 will assume their in the detent I8 to hold the disk gangs I and 2 permanently in their angular relation.

Having fully described our invention, it is to be understood that we do not wish to be limited to the details herein set forth, but our invention is of the full-scope of the appended claims.

We claim:

1. In a single tandem disk harrow, the comthe gangs of disks together, a' holding bar connected between the gangs for holding the gangs in angular relation, means at one end of the holding bar operable to determine the angular relation of the gangs as they pivot around the said pivotal connecting means, and a releasable latch means at the other end of the holding bar and releasable to permit the gangs to swing together from angular relation.

2. In a single tandem disk harrow, the como ,bination of a forward gang of disks and a rearward gang of disks, means pivotally connecting the gangs of disks together, a holding bar connected between the gangs for holding the gangs in angular relation, means at one end of the holding bar operable to determine the angular relation of the gangs as they pivot around the said pivotal connecting means, anda releasable latch means at the other end of the holding bar and releasable to permit the gangs to swing toably connecting the latter said releasable connecting means and a draft means for the disk harrow operable automatically upon turning of the tractor to release the latch means.

3. In a single tandem disk' harrow, the combination of a front gang of disks and a rear gang of disks, means for pivotally connecting the gangs of disks together to permit the gangs to swing to the gangs to a tractor, a connecting bar, adjustable means ,for' adjustably securing a connecting bar to one gang of disks to determine the singularity of the gang of disks, releasable means for securing the connecting bar to the other gang of disks, an arm connected with the tractor, and means connecting the arm and the releastractor to release the releasable means and permit the gangs of disks to move together on tuming'of the tractor in"a direction to cause the bar row to negotiate a turn around the ends of the gangs which are open when in angular relation.

4. In a single tandem disk harrow, the combination of a front gang of disks and a rear gang of disks, means pivotally connecting the gangs of disks together to permit the gangs to swing apart to angular relation, a. holding bar operatively connected between the 8 m means operatively connected between one of said gangs of disks and the holding bar for determining the angular relation of 'said gangs of disks as held to be connected to a draft means, and means operatively connected between the draft means and the latter said latch means and operative,

to release the latter said latch means upon tuming of the draft means to permit the gangs of disks to swing together out of angled relation.

5. In a harrow adapted to be drawn by a tractor having a control member connected thereto and offset from the point of draft connection of the tractor, the combination of: a forward disk gang; 2. rearward disk gan rpivot means connecting said disk gangs and adapted to permit relative movement of said disk gangs to and from angled relation; hitch means connected to said forward disk gang; a bar member connected to one of said disk gangs; latch means between said bar member and theother of said disk gangs; latch release means connected to one of said disk gangs and operable to release said latchmeans; and connecting means for connecting said control member of said tractor and said latch release means.

6. In a harrow adapted to be drawn by a tractor having a control member connected thereto and offset from the point of draft connection of the tractor, the combination of: a forward disk gang; a rearward disk gan pivot means connecting said disk gangs and adapted to permit said disk gangs to swing apart to angled re lation; hitch means connected to said forward disk gang; a bar member connected to one of.

said disk gangs; latch means connected between said bar' member and the other of said disk gangs; latch release means pivoted on one of said disk gangs and operable to release said latch means; and connecting means for connecting said control member of said tractor and said latch release means and adapted to rotate said latch release means on said pivot' to release said latch means.

'I. In a single tandem disk narrow, the combination of a front gang 'of disks, a rear gang of disks, pivot means connecting the disk gangs together to permit the disk gangs to be angled apart at one side of the 'harrow, a hitch connected to the front disk gang, a draft connection at the forward endof the hitch, an angle control bar, a'latch connected between the angle control bar and one of the disk gangs, a fixed arm extending transversely from. the draft connection, a latch release means mounted on one of said disk gangs, and a connection from the fixed arm to the latch release means.

8. In a single tandem disk narrow, the combination of afrontgang of disks, a rear gang of disks, pivot means connecting the disk gangs together to permit the gangs to be angled apart at one side of the narrow, a hitch connected with the front disk gang, an angle control bar, a latch connected between the angle control bar and one ofsaid disk gangs, a fixed arm extending transversely from the draft connection, a rotatable latch release means :lorumallecil on one of the disk gangs, and a connection from the fixed arm to the latch release means adapted to rotate the latch release means to release the latch.

HOWARD B. RALPH E. 

